Guangtai Lu

The generation of arbitrary polarization states of light is essential for optical communication and photonic information processing. Photonic crystal and metasurface platforms supporting bound states in the continuum (BICs) provide a powerful route for polarization engineering by tailoring the radiation from the resonant modes.

1 Introduction Topological photonics is proving to be highly effective in advancing photonic systems.[1-3] Due to the variety of topological phases, plenty of novel photonic devices utilizing different topological states have been demonstrated, including unidirectional photonic waveguides with photonic quantum Hall phase,[4-6] robust topological waveguides with photonic quantum spin Hall phase[7-10] and photonic quantum valley Hall phase,[11-13] and topological nanocavities with higher-order...